| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.apex.malhar.contrib.apachelog; |
| |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.validation.constraints.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.apex.malhar.lib.logs.InformationExtractor; |
| |
| /** |
| * An implementation of InformationExtractor that extracts the time stamp in milliseconds from epoch from an arbitrary date string. |
| * <p> |
| * @displayName Timestamp Extractor |
| * @category Output |
| * @tags timestamp, date, extraction |
| * @since 0.9.4 |
| */ |
| public class TimestampExtractor implements InformationExtractor |
| { |
| private static final Logger LOG = LoggerFactory.getLogger(GeoIPExtractor.class); |
| private static final long serialVersionUID = 201404221817L; |
| @NotNull |
| private String dateFormatString; |
| private transient DateFormat dateFormat; // date format is not serializable |
| |
| public void setDateFormatString(String dateFormatString) |
| { |
| this.dateFormatString = dateFormatString; |
| } |
| |
| @Override |
| public void setup() |
| { |
| dateFormat = new SimpleDateFormat(dateFormatString); |
| } |
| |
| @Override |
| public void teardown() |
| { |
| } |
| |
| @Override |
| public Map<String, Object> extractInformation(Object value) |
| { |
| Map<String, Object> m = new HashMap<String, Object>(); |
| try { |
| Date date = dateFormat.parse((String)value); |
| m.put("timestamp", date.getTime()); |
| } catch (ParseException ex) { |
| LOG.error("Error parsing \"{}\" to timestamp using \"{}\":", value, dateFormatString, ex); |
| } |
| return m; |
| } |
| |
| } |